The award comes after a review of standards, practices and facilities carried out by an external team from the Royal College of Psychiatrists in July this year.
AIMS is a standards-based accreditation service designed to assure service users and staff that the care provided in psychiatric wards is of the highest quality. The accreditation at Level 1 is valid for up to four years, subject to a two yearly self review.
Rashid Moedine, governance and audit lead at the Priory Group, said: "This accreditation is a national recognition of the quality of care Priory Group provide for its patients. The process of self and external review leading to this achievement has enabled us to further improve the consistency and quality of our services."
"I am extremely grateful to the AIMS project team who worked hard towards achieving this excellent accreditation and my congratulations go to all who contributed."
The hospital, based in Grovelands House, The Bourne, Southgate, opened in 1986 and has established an excellent reputation for providing the highest standards of care. For people suffering from mild to moderate mental health issues, such as depression, stress and anxiety, the hospital provides a range of outpatient based therapy services such as individual and group based Cognitive Behaviour Therapy. For those people requiring inpatient care for more severe psychiatric illness such as depression, psychotic illness or addiction, there are residential facilities for 52 patients. Priory has a highly experienced team of mental health professionals and support staff, which include consultant psychiatrists, psychologists, nurses and therapists.